I think this is my favorite serum by far! I like how it's almost like an oil and a serum combined. You can see the 2 substances separate and settle apart from each other. Then you shake the bottle up and the ingredients combine together. Make sure to shake the bottle up very good before using! It was a trial and error process for me. The first time I used this product, I followed the directions to a T. The product left my hair a bit greasy, just because it was too much for my hairs thinness. So next time, I used 2 sprays on my scalp and 3 sprays on my hair length. This serum controlled frizz, gave my hair a nice shine, prevented breakage while brushing, etc. It overall made my hair look and feel healthier. I love the floral, outdoorsy scent! This Bio Brew serum is good for anyone- no matter your hair hydration level, hair texture or thickness of hair. It can help with different hair concerns. I really liked/enjoyed this serum! **This review was collected as part of a promotion.